Shafting.



Patented Dec. ll, I900. J. GIROUX.

SHAFTING.

('Applicatian filed Mar. '7, 1909.)

(No Model.)

[/V VENTOR Attarney UNITED STATES PATENT OFFICE.

JOSEPH GIROUX, OF NEW YORK, N. Y.

SHAFTENG.

SPECIFICATION forming part of Letters Patent No. 663,748, dated De ember11, 1900.

Application filed March 7, 1900.

To all 21/77/0177, it may concern.-

Be it known that I, JOSEPH GIROUX, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Shafting, of whichthe following is a specification, reference being had therein to theaccompanying drawings.

This invention relates to shafting for heavy machinery.

The object of the invention is to produce a shaft which shall be strongand relatively light, and which can be ventilated or cooled with ease.

Figure l is an elevation of such a shaft ap plied as a railway-axle.Fig. 2 is a cross-section of the shaft, and Fig. 3 a broken sideelevation of a shaft. Fig. 4 is a perspective of one of the segmentswhich go to make up the shaft proper. Fig. 5 is a perspective of thesleeve orjacket of the shaft. Fig. 6 is a broken perspective of theplate from which the sleeve is made. Fig. '7 is a perspective, and Fig.8 a sectional View of a modification.

A indicates a segment of a tube, preferably of rolled iron or steel.Such a segment can by repeated rollings be made to have a high degree oftensile strength. My preference is to have each segment rolled as athird of a tube, although the number of segments may vary. The edgesa acan be planed to an exact finish should there be any imperfection orinequality in the rolling, and such work can be done at small cost. Themetal will be rolled so that the fiber extends lengthwise of thesegments. \Vhen the edges of segments A are smooth, a butt-weld mayunite such edges to form a tube. As shown in Figs. 7 and 8, the sectionsA may have tongue-andgrooved edges. /Vhen such are joined and weldedtogether, a lap-weld results.

The cover or sleeve B may be a similar or different grade of metal fromthat of segment A. This sleeve will be rolled as a fiat plate 13, thedirection of rolling being such as to extend the fiber of the metalcrosswise or widthwise of the plate, as indicated by the double arrow inFig. 6. The edges 17 b of this plate may be planed or dressed to theproper .lerial N0. 7,712. (No model.=

form, so that the plate B will roll into a tube 13 with a single joint,which is to become a welded joint.

The tube-section A A A when assembled form a tube. This is inclosed inthe tube 13 and the whole heated and the joints welded,-

either under a heavy hammer, if the shaft be of large diameter, or byrolling, when small shafts are constructed. The modifications shownshould make it clear that the welded joints may be of any of the usualforms for welded joints. The welds having been made, as indicated, theshaft is completed in usual manner. As the shaft is hollow, a current ofwater may pass through it. In steamships the rear end of the shaft maybeleft open, and by simple means a water circulation through the shaft maybe maintained. In axles and line-shafts the open ends of the shaft willpermit air circulation within the shaft if suitable couplings be used.Such circulation of air or water will tend to prevent hot bearings andwill secure a gradual cooling from within.

Should it be necessary to cutaway a part of the shaft to form bearings,as at C, it is advisable to out less than the thickness of the outsidesleeve portion B, as the arrangement of the metal in said portion isbetter for a bearing than is that of sections A.

The finished shafting consists of an integral tube of metal having ahollow central portion composed of segments welded to each other, thefiber of metal in said central portion extending lengthwise of the shaftand an outer layerof metal with the grain or fiber extending circumferentially, all being welded into a single permanent shaft.

Of course itwill be understood that shafting so constructed is adaptedfor use as piston or pitman rods or for other uses connected withmachinery.

What I claim is 1. A shaft for machinery consisting of a tube of metalhaving that portion next the central opening with the grain or fiberextending in longitudinal direction, and an inclosing layer of metalhaving its grain or fiber extending in generally circumferentialdirection, substantially as described.

2. A hollow shaft having its central section tube having its fibersrunning circumferencolnposed of segments of a tube with welded tially,substantially described. 10 edges, and an inclosing tube having itsedges In testimony whereof I affix my signzttu re joined bya \veld, allbeing Weldedinto a single in presence of two Witnesses. 5 structure,substantially as described. JOSEPH GIROUX.

3. A hollow shaft having its interior por- Witnesses: tion composed ofsegments lap-Welded to- W. A. BARTLETT, gether, and its exteriorcomposed of a Welded CHAS. K. DAVIES.

